Paper bag



J. MGCULLOUGH.

Paper-Bag No. 224,934.

.agatented Feb. 24, 1880.

N. PEI'EIS. FHOTO-UTMDGRAFHER. WASHINGTON. D. C.

LnA

y UNITED STATES PATENT OFFICE.

JOSEPH MGCULLOUGH, OFPHILADELPHIA, PENNSYLVANIA.

PAPER BAG.

SPECIFICATION formingpart of Letters Patent No. 224,934, dated February24, 1880.

` Application led August 16, 1877.

To all whom itmag/ concern:

Be it known that I, JOSEPH MCGULLOUGH, of Philadelphia, Pennsylvania,have invented anImprovement in Paper Bags, `of which the following is aspecification.

This invent-ion relates to that class of paper bags known assatchel-bottoms-that is, a bag which, when filled, will readily assume asquare form at its bottom end; and theinvention particularly relates tosuch bags when constructed from a rectangular blank or sheet of`material having its two sides folded inwardly and their edges pasted sothat when 4said blank is doubled upon itself on a transverse line saidpasted edges will unite and form a bag with two side seams and bellows-1 like folded sides, whereby, when it is extended by being filled, saidsides may expand and its bottom so fold as to transform its fiat forminto a cubical one.` This form of bag is an exx ceedingly practical oneto make, for thereason that it may be readily formed from a continuousweb in thefast machines now in use, from which it may be delivered inflat form; but

such bags are of objectionable structure in themselves, none existingwhich are free from all the. defects known to this paper article.

One form of bag of this class has the edges of its inwardly-folded sideswhich form the bellows fold turned backward, so as to providepasting-surfaces, which, when united by y doubling the blank.transversely, constitute the seam, uniting the parts in bag form. Sucha bag presents the two parts forming its side walls united by anopen-edged seam, which, as is obvious, will, whensubjected to the`strain incident to the useof suchl articles, be weak and liable tobedrawn apart. Bags having `this form of side seam have therefore beenlong since discarded as of faulty and inoperative construction.

y `It is the'purpose of this invention to remedy these defects and toproduce a bag of such a construction as will provide lapped- .i Eline ofits transverse folding at the bottom,

thusformin g atight `bag throughout the structure, lall of which will bemore fully herein-` after set forth.

y In the drawings, Figure showsthe blank from which the bag is made;Fig. 2, a blank with the longitudinal folds; Fig. S, said blankwhenfolded transversely and united in bag form; and Fig. 9, said bagwith its bottom opened out and folded into square form, Figs. 3, 4, 10,and 11 being similar views of amodiiication, Fig. 5 showing a section onlineaI of Figs. 2 and 4; Figs. 6 and 7, similar views ou line b of Fig.2 and on line o of Fig. et.

In carrying out myinvention, a rectangular strip of paper or similarmaterial (it may be cut from a web) is cut at the points 1 l with shortnicks, which are on the line 2, upon which the blank is to be folded tocomplete the bag.

wardly upon the lines 7 7, Fig. 1, thus forming the doubled edges 8-8,Fig. 2.V The edges of these folded laps are thenfolded outwardly on thelines 9 9 to form the pasting-flaps 10 10, Fig. 2, which laps extendfrom the foldingline 2 to one end of the blank, the nicks 1 l permittingthis doubling. These flaps 10 10 are then coated with paste, and theblank is doubled transversely on the line 2, thus bringing the pastedflaps 10 onto the inwardlylapped sides 11, to which they are united,thus forming a lapped and flat seam, 12, as in Figs. 8 and 9, the formershowing the bellows fold formed by the lapped sides as opened or spreadapart. These seams 12V thus extend from the line 2 of the bottom foldand unite the sides perfectly from end to end with a lapped and iiatseampossessing great strength.

. If it is desired to omit the projecting edge 13, as in Figs. 10 and11, this may be accomplished by cutting off such portion, as at 14, atthe same time that the nicks 1 are cut and while the material is dat, asin Fig. 2. Thus constructed, the bag may be made upon thecommoncontinuous machine and produced at very slight expense, as it isobvious that romove `the surplus edge 13, that the inward folds, 11, andoutward folds, 10, may be accomplished by turning-guides, the ,pasteapplied to the flaps 10, the bag-lengths cut off, and the transversefold 2 made while the web passes continuously through the machine.

The bag thus produced is provided with the strongest form of side seams,`which are made to extend throughout the entire length of the The sides56 of this blank are then folded inbag-sides, thus forming an articlewithout aeentral seam, each seam of tWo thicknesses, 1o Weak points ofunion, and one which is Whole Without loose aps, as set forth.

throughout its structure. In testimony whereof I have signed my What,therefore, is claimed isname to this specification in the presence of Asa new artiele of manufacture, a square .two subscribing Witnesses.

closed bottom paper bag consisting of one JOSEPH MCGULLOUGH.

sheet of paper, having the bottom and two Witnesses:

opposite sides seamless, With the folds upon T. SEYMOUR SCOTT,

the bottom, and at each of the two other sides GI-IAs. D. WAsHBURN.

